Product Comparison: HiFiMAN HE-400I vs OPPO PM-3

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Best Pick

HiFiMAN HE-400I Over Ear Full-Size Planar Magnetic Headphones

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OPPO PM-3 Closed-Back Planar Magnetic Headphones

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General Specifications

Brand

HiFiMAN

OPPO

Model

HE-400I

PM-3

Origin

China

About the Product

The HIFIMAN HE-400i is a high quality, full-size planar magnetic headphone designed for critical listening in the home or studio. At little more than twelve ounces, HE-400i is 30% lighter allowing the listener to comfortably enjoy music for hours on end.

The OPPO PM-3 combines true audiophile performance, elegant styling, noise isolation and portability into a pair of sleek lightweight Planar Magnetic headphones. With the PM-3, users can easily recreate the experience of listening to a pair of flagship headphones on a flagship amplifier.

Key Specs

Type

Over-ear

Closed over-ear

Sensitivity

93 dB

102 dB

Min. Frequency Range

20 Hz

10 Hz

Max. Frequency Range

35 kHz

50 kHz

Impedance

35 Ω

26 Ω

What customers say about "Key Specs"

HiFiMAN HE-400I Over Ear Full-Size Planar Magnetic Headphones

The sound quality is amaaaaazing!! I had while listening to many of my favorite songs was that how much detailed the the songs actually were.
They sound amazing, and I expect they'll hold up over the long run.
They also sound great with my iPhone 7 Plus using the Dragonfly and an Apple USB camera connector dongle.
I absolutely love these headphones. Very crisp, clean sound.
These are the best sounding headphones I have ever tried. Everything is so crisp and clear and the soundstage is massive.

OPPO PM-3 Closed-Back Planar Magnetic Headphones

The sound has zero distortion and there is, in my opinion, a perfect balance between bass, vocals, treble.
Songs sound natural and clean. I hear detail in songs I never heard before and there is also set a bit of a sound stage.
The PM-3's sound good enough on my phone, although they do sound richer and the bass heavier with the amplifier paired with my phone.
Fantastic neutral sound. Planar magnetic is definitely an advantage over traditional drivers.
Neutral songs may sound flat to those used to heavy bass headphones.

Size & Weight

Height

8.27 in.

10.9 in.

Width

7.09 in.

9.8 in.

Depth

4.13 in.

5.1 in.

Weight

13.05 oz.

11.29 oz.

What customers say about "Size & Weight"

HiFiMAN HE-400I Over Ear Full-Size Planar Magnetic Headphones

These headphones are pretty portable and quite small.
I consider that I have a medium size head, fit it ideally in my head.
The comfort is great, it sits perfectly well on my small head, the clamp is perfect
The pads are comfortable (the light weight is dispersed over a larger surface area than most headphones).
If you have a small head, you will probably find this headphone too big and it won't fit on you.

OPPO PM-3 Closed-Back Planar Magnetic Headphones

Very comfortable and light. Built like a tank with the design like an iphone
They've balanced portability, size, durability, comfort, and sound amazingly well.
Amazing listening experience who has a normal sized head. Good lightweight design, but sturdy, except ear cups.
Looks like a normal headphones in size and feels a bit heavier in weight, and that's mean they are solid.
They were too small on head and I was going to return them.

Features

Driver Diameter

2.36 in.

2.17 in.

Detachable Cable

Yes

Foldable

Headband Material

Leather/Metal

Aluminum / Leather

Cable Length

4.92 ft.

9.84 ft.

Microphone

Yes

In-Line Remote

Yes

Extras

Planar Magnetic Headphones, Striking Contemporary Design, Crystalline Metal 3.5mm Cable, Velour / Leatherette Earcups

Unique Planar Magnetic Sound, Double-Sided Spiraling Coils, 7-Layer Diaphragm, FEM-Optimized Magnet System, Optimized for Mobile Use

What customers say about "Features"

HiFiMAN HE-400I Over Ear Full-Size Planar Magnetic Headphones

Generally, I found the HE-400i's performed best with music that featured higher frequencies.
You can drive these from your IOS device, and they sound good, but my preference is to use amplification if readily available.
The good large pleather ear cups that have soft velvet like material touching my head.
In addition, the foam ear pad on the left side is separating from the driver casing.
The thing is these are open headphones. Your office or room mates are not going to like the sound leakage.

OPPO PM-3 Closed-Back Planar Magnetic Headphones

Headphones provide good noise isolation with their build.
Planar is the way to go for a comprise between driver and electrostatic and these hit a home run for price, quality and most important the sound.
Comes with separate long and short length cables, so you can listen it from home and on the go.
Unlike premium models, the pm-3 used faux leather on the ear and head cushion.
The only thing I didn't love is the synthetic leather pads.

Warranty / Certifications

Certifications

Manufacturer Warranty

1 year(s)

Other Information

Manufacturer

Link

MSRP

449.00 $

399.00 $

Manual

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